Final answer:
Water comprises the largest portion of total body weight, it is a good solvent, and it is composed of polar molecules.
Step-by-step explanation:
The correct statement about water is D) All of the above statements about water are true. Water comprises the largest portion of total body weight, it is a good solvent, and it is composed of polar molecules. Water is considered the "universal solvent" as it readily dissolves ionic compounds and polar covalent compounds due to its polarity. This property makes it essential for life and allows for many important processes in the body.